Inbotany, anumbel is aninflorescence that consists of a number of shortflower stalks (calledpedicels) that spread from a common point, somewhat like umbrella ribs. The word was coined in botanical usage in the 1590s, from Latinumbella "parasol, sunshade".[1] The arrangement can vary from being flat-topped to almost spherical. Umbels can be simple or compound. The secondary umbels of compound umbels are known asumbellules[2] orumbellets.[3] A small umbel is called an umbellule.[3] The arrangement of the inflorescence in umbels is referred to asumbellate, or occasionallysubumbellate (almost umbellate).
Umbels are a characteristic of plants such ascarrot,parsley,dill, andfennel in the familyApiaceae;ivy,Aralia andFatsia in the familyAraliaceae; andonion (Allium) in the familyAlliaceae.
An umbel is a type ofindeterminate inflorescence.[3][4]A compressedcyme, which is a determinate inflorescence, is calledumbelliform if it resembles an umbel.
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